Machine for making envelops.



0. W."COWG|LL. `MACHINE FOB'` MAKING ENYELOPS,

l APPLICATION FILED IMYIB. |909'. V1,21 8,597. Patented Mari 6, 1917.

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0. W. COWGILL. MACHINE ron 1111111116 ENvELoPs.

A APPLlcMloN FILED 111411111, 1909. 1 1,21 3159.7 v Patented Mar. 6, 1917.

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1,218,597. Panted Mar. 6,1917.

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APPLICATION rFILED MAY I8. |909.

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MACHINE Foa MAKING ENvELoPs.

APPLICATION FILED MAYJILIEUB. L21 8,597. V Patented Mar. y6, 1917.

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Patented M9156, 1917.

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MACHINE FOR MAKING ENVELOPS.

APPLICATION FILED MAY I8, 1909.'

Patented Mar. 6,'1917.

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MACHINE F0 6, 1917. nur lo.

R MAKING ENVELOPS.

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peratory `to roller.

UNITED STATES PATENT OFFICE.

OBPH 'W'. COWGILL, 0F ST. LOUIS, MISSOURI, ASSIGNOR OF TWLVE ONE-HUNDREDTHS TO 'OTTO F. STIFEL, TWELVE ONE-HUNDREDTHS TO L. H. TIEMANN, TWELVE ONE- H-UNDREDTHS T0 A. G. SOLARI, AND TWELVE'ONE-HUNDREDTHS T0 JACOB BON- GU'ER, ALL OF ST. LOUIS, MISSOURI, AND TWELVE ONE-HUNDREDTHS T0 THE NVELOP MANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION O F MISSOURI.

Specification ot' Letters Patent.

Patented Mar. 6, 1917.

Application filed May 18, 1909. Serial No. 496,708.

To all 'whom it may concern.'

Be it known that I, Oarii W. CowoiLi., a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Machines for Makin Envelops, of which the following isa.' fu l, elear, and exact description, such as will enable others skilled in the art to which itappertains to 'make and use the saine, reference being had to the accompanying drawings,.forming part of this specification, in whieh,-

Figure 1 is a side elevational view of my im roved machine. lzig. 2 is a verticalscctional view through the same.V

1"L`ig..3 is a top plan view. l Fig. 4 is a side elevational v iew, in lfull size of the gripping plate and its associate ar p Fig. 5 is a plan view of the lower gripping plate and its associate parts.

Fig. 6. is a rear elevational view of theV lower gripping plate and its associate parts.

Fig.y7 is a top plan view illustrating the means for positioning a selected blank preits beinggripped by the feed Fig. l'8 is a detail view of the disappearing pins and their associate parts employed in ythe feeding mechanism.

Fig. 9 is a detail view of the gumming rol-iler.

'F ig. 10 is a detail view of the'feed roller.

`*lil-ig. 11. is a detail view of theineans for manually operating the'plate on which is ai'- rangedthe stack of envelop blanks.

l'Big'. 12 is al detail view of the mechanical means for'raising said plate t'o elevate the stack as'tlm-blanks are fed from the top thereof.

Fi 13 is a vertical sectional view through the ower'gripping plate and its associate lparts.

' its companion.

Fig. 15 is la diagrammatic view of the. means for operating thc-creasing frame idenf' tified with the lower gripping plate.

Fig. 1G is* a diagrammatic view of the `then gripped between two'4 means for operating the end-foldin plates identified with the lower gripping p ate.

Fig. 17 is a detail view showing the lever connection between rthe cani' and the rack bar identified with the end-folding plates. v

Fig. 18 is a diagrammatic illustration of the upper gripping plate and means for rocking it to maintain parallelism with its companion.

Fig. 19 is a diagrammatic. view illustrating means .for operating' the scaiing plate.

Fig. 20 is a diagrammatic view illustrating the position of the u )per and .lower grip ping plates when a blank is fed therebetween in proper position to he gripped. V Fig. 21 is a similar view showing the plates parallel to each other and gripping the blank just before the creasing fraineopcrates.

lfig. 22 is a diagrammatic view illustrating" the several succeeding operations uien thc blank, the creasing frame being raised at the upper portion of`said ligure, the end plates being folded in atI the left ofsaid figure,and the sealing -plate being folded in, the end' )lates heilig retracted at the bottom ofsaid gare.

This invention relates to a new and useful improvement in machines for making envelops, the object being to simplify the con struction of machines of this character. and' to increase the output of such machines.

-Accordinnr to my present invention, the envelop hlan 's are stacked upon a suitable plate, which is automatically elevated 'as the ilanks are successively fed from the top of the stack. These. blanks after being fed from the top of the stack are properly posi,- toned by pins which disappear and 'permit the onward feed of the lilankw'hen gripped by the feeding rollers. In this way theexact position of the blank with resp et tothe gripping plates is maintained. W ile bein fed' nwardhy the feeding rollers the hlan c receives gum along the edges of its flaps .at appropriatepoints. The gnmmed blank is p ntes cooperating as companions. andconstituting with their associate parts one of .a series of folding mechanisms mounted to revolve about fixed axes and successively acting upon blanks as the blanks are fed between the ripping plates. While held between the p ates, the4 flaps at the sides .of the blank are creased, and after the upper grip in vplate recedes und while the blank 1s he d y the creasing frame, the end fla s are folded in. 'The bottom fla l is then olded down and sealed to the fo] ed end flaps. The gummed top Hap which is to remainy free may be further creased, 4if' desired, after' which the completed envelop is discharged on to' a conveyer belt, where 1t' may either be sent to a drying room or be permitted to dry preparatory to being packed.

In the accompanying drawings, 1 indicates the side frames, which arepreferably made of castings connected together by cross bars2. 3 is a. belt mounted in the lower por-4 tion of this frame passing over a sheave 4. In the en'd of the axle of this sheave is arranged a ratchet '5, with which coperates p11-wl 6 onthe end of a pitman 7 having an eye in its upper end to embrace an eccentric 8n mounted on the power shaft 8 of the machine. In this manner the belt 3 is driven, step by step, to remove the finished envelope that are deposited thereon.

' Shaft 8 is provided with fast and loose pulleys 9 and 9 (see Fig. 3) at one end and a. hand wheel 10 at the other end, the latter -'being to enable the operator to properly adjust the several parts in relation to each other so that the blanks will be fed properly after the machine is started. 11 is apmion mounted on shaft 8, with which meshes a pinion 12 for driving gear 13 and its' companion meshinggear 14, these gears mounted upon the Aends of shafts 13l and 14l to'be lieremafter described. Also meshing with gear 11 is a transmitting gear 15 which drives the gear 16 on'` the end of -one of the feed rollers, said gear 16 meshin withlth'e gear17, vof the companionfeed ro ler.

A pinion 18 driven through ar'17 drives a gear 19 onthe end of the rol er which 'initially` moves the blank into position against the' disappearing ins. Also meshing wlth gear 11 is a gear 20 on the end of .the gunimlng roller-,'whichfgear 20 i drives a tranfof gears 21, 22 and 23- on the endsof gum-spreading rollers, the roller 63 bein arranged in a. potfor collecting-the gum to distributed andspread by the interveni' .rollers Y Refe'rringnow td Eig. 3, it :will A'be observedthat -the pinion 191 is on the end of a shaft 24 carrying" two polished collars 25 Ybea-ring upon` the uppermost envelo blank. Thesep'olished collarshave no ten ency. to.

feed the blank. Betweenthe :polished-c01- lars aref rubbeiirings 26, which have enlarged Zand 10); which-enf largedportions are of the sameyor-greater diameter than the-.- collars 25. When' -the shaft 24.iefr0tetedfn1ersadrin 26 'be verticallyupon t -tate.. In order to clamp thelhand wheel to the two rubber rings'adja'cent thecollars 25 are so positoned.- that they willV in their rotation feed the topmost blank into the machine between the feeding rollers hereinafter described, ithe central ring 26 havin an enlarged portion which coperateswit 1 the uppermost blank to give it a final and excessive movement against the disappearing stop pins, so-that if the blank is not properlypostioned against the stop pins-by the rings 2'6, the ring 26" will correct the inaccuracy. If the blank is fed forward to its proper position by the rin s 26, then'the ring 26b merely, presses t 1e blank more firmly against the stop pins, causing it to bulge slightly but which bulge disappears the instant the ring 26" lets go, which substantially coincides with the time that the feeding rollers take hold of the blank by what might be termed its top flap.

The Stack of envelop blanksis arranged upon a plate 27 carried by a movable frame 28 dovetailed upon a bar 29 (s ee. Figs. 1 2, 3 and, 11). In the channel of this bar 29 is arranged a rod-30, upon whose upper end'is,

witha side-.faced cam 37 on .the end'of the feedrollei` 4shaft 38, upon whose opposite.

end the gear 16 is mounted. -'B. 'this con'- struction, at each revolution' o ythe feed roller the pawl 32 isv ib rated." As'prin 33 .holds the roller f36 lagainst the sldeaced cam 37. As shown .in Fig. 1 1,-"rod 30. is provided with a longitudinal groove for re ceivinga key or projection 1n the hub. or sleeve of worm 39 confinedbetween :lugs or bearings on the frame 28, which extend into the channel :of bar 29v and embrace-,the rod30." 40indicates a. shaft mounted in suitable bearngsin the `frame28. lThis shaft has a friction member 41 pinn'ed thereto? (s'ee'Fi 11 whichfricton memberco rteslwit a worm wheel 4 2 in mesh :with t e worm 39.` Worin-wheel 4 2 is mounted fupon' a sleeve :43, upon which -is keyed a pinion 44 `in mesh with a ra'ck 45 secured to the channelbar 29.

tion. In this opleration, the worm is slid erod 30, but does not ro- -the worin gear 42, I thread the' end vof rod carrier'plate 27 can beLmahually raised or lowered at the will Tof 'the operator by rotat-l ing the hand wheel'46 in the proper' direc-- 4:0 and provide thesame, with-abend nut 47,`

When this hand 'nut is turned so thatthe i'ibtiondisk 41 will clamp th' e .worni therelatween and the pinion 44, the hand wheel to can no longer he freely turned by the hand but only by the worm gearing. Thus. when the pawl 32- is vibrated and the ,rod rotated with a step-by-step movement, the plate 27 is caused to rise, the npward movement of the plate at each operation heilig equal to the thickness of an envelopblank. In order to regulate this upward movement of plate 27, I provide the arm with a slot so as to adjust the conneetion of link 34 outwardly or inwardly, and so increase or diminish the stroke of pawl 32, depending upon the thickness of the paper of the blanks to be fed.

As the stack of blanks is fed upwardly no the uppermost blank is moved by the rubber rings heretofore described, such movementl positions the blank against disappearing stop pins48, heretofore referred' to. These stop pins are mounted upon a shaft 4S* under aplate 49 (see Figs. 2, 7 and 8), said pins projecting openings in the plate as shown.

An arm '50, carrying aroller 50* is held by al spring 50h against-the edge .of cam 51 mounted on a shaft 3S, on which pinion 16 is mounted. -By this construction, the

stop pins 48 project through the openings in plate 4910' coperate with the envelopA blank while the rubber ringsare. feeding said blanks thereagainst. As shaft38 rotates the cam 51 permits the .s top pins 48 to recede or disappear, and coincidentally therewith a feed roller 53, -coperting with its companion roller 54, grips the top Help of the envelo blank and moves it onwai The feed .rol er v331 justA referredV toy is prof vided witha flat face 5 3, which in its ro tationv is presented to tlieblankand permits the blank to be' Aproperly positioned against the pins-48, as shown in F ig. V2, and when the ilank 'lis properly p'ositioned,'the

@da of said flat portion of the roller grips t e blank and feeds it.on\ vard. .By providing roller 53 with a flat'fiiee it may be'rotati'vely adjustcdjon'the shaft. 38 by means of setV screws (notfshown), and the time that the blank is gripped between the rollers, withrelation4 to the other exactly determined. i

In connection; with the=-ab`ove, I wish-to say that the Iflat portion 53},is not cofext'ensive with' width-of" theblank, but is only parts vvof th'eV machine wide enough to permit of the introduction of a top Hap. IIn this manner-it is Vpossible to feed a blank against the stop-pins in position to be gripped y the feed rollers-5 3- and 54 before the pfrecec. ing blank'has ,been fed onward lbeyond ,said Trollers. the"v preceding blank being fed onwardby the cylindrical' ends of rollferf53 and: interferingvln no 'way Iwith theintroduction ofthe top, Hap of. the next blank into the space. provided bythe up througln .inapt '6 2'andis carried a rollerl-l wl-iich-is in eontact'witlr the diss tribnting roller 5!)l heretofore referred to. A

to operate the rubber rings which initially position the envelo i blanks against thi` stop pins at a slow Spee( colnpared to the feeding movement of rollers Vit-5l, which is of advantage in th'at such slower speed enables the rubber rings to easily pick up and more the top blank.

Guide bars 49 are adjustably mounted in' brackets l'i extending from the side frames, said guide barsextending parallel Vto the direction of travel of theplate .T and its superimposed stack of envelop blanks. These guide' bars are located oneach side of the top flap and hold the. blanks in the proper position to befed. Said blanks are fed -by the 'rubber rings 2G". thel uppermost blank, if slightly below the upper edges of tlieguide bars` being easily forced up and over the inclined edges of said guide.

bars. 'A The plate 27.- is arranged at the dcsired angleywith relation to the guide bars, so that' the uppermost blank .will b e fed, though it is'as much as one quarter of an inch below the upper edges ofthe guide bars. The stroke of pawl 3Q need not.' on this account` be adjusted to feed the stack exactly the proper amount each time.

The blanks` while between the rollers 53 and 5l, are guided by plate to pass be tween rollels 56 and 57, the former fof which is mounted. on the )ower shaft' S of the ma.-

latter is mounted o-n a shaft 5S on which is arranged the gea'r Q0. Roller 571 is the gumrning roller and haslraised surfaces 57* of proper material ping them, to c aiise them to be guided between the gripping plates, a'sshbwn in F-ig.

1e gumA for-.the plu'lliose is .contained y 'as roll-er 63 to sera in blade 65 rel dates amount of um P g .gl g

vtransferred from roller ,6Std-roller 64.

, Twill now describe-the manner4 in which lthe flaps on. the" rummed -blankarepfolled and the envelop' ormed; Y

Referring to .Figd 2, -it..will observed thatK on -the shafts 13.,.iind -1-'l. are sleeves havingradial projeetion's, n 'hiclr are secured, by1 means 4of suitable "screws, remar'- able 'frame pieces (i6 .and G7 respeotivelv which carry the envelop-fm'mlng merha -nisrrn1 the? devices onfsaid frame -pieees bemay be as many of thesecomp'lementnry, revoluble envelop-forming mechanisms, each complete in itself, as desired. In the accompanying drawings, I have shown four of such complete forming mechanisms. As the several forming mechanisms are the same in construction and opera-tion, I will describe but one of them.

As the gummed blank is fed between the rollers 56 and 57, being stripped by the blades 60, ,y the upper and lower gripping plates 68 and 69 approach each other, as shown in Fig. 20, until their advancing edges meet. The blank is now caught, and lli the contact of the gripping plates at this time, if the blank has been properly fed and positioned, is along the line of the crease of 'the top or free flap of the envelop. It is pbvious that. the gripping plates cannot it( travel 'in intersecting arcs', and means are provided to rock both of said plates from the position shown in Fig. 2O to the p'osition shown in Fig. 21, during which time the grip of the plates upon the blank is not relinquished. Both 'gripping plates could be mounted upon piv'oted bolts, but I- pre erto provide them with semi-circular, su ports 68 and 69 respectively, which, fit l1n appropriately curved ways. In this manner I am enabled to locate the axis of the rocking movement of each plate substan tially" coincident 'with the working face thereof.

AOneof the grip ing plates is preferably mde'yielding so tiat said plates can cop- Ierate with different thicknesses of paper. I' l1e.ve shown the lower gri ping plate as being mounted Vin a. yielding lock 68" in the frame 66, -suitable springs being provided to press said block outwardly. v

Means forl rocking the upper gripping yplate is illustrated in Figs. 4 and 18, Aand consists of a cam70 fixed to one 'ofthe side frames of the machine. This'cam coperates with a roller on olie end-of a'bell crank lever 7 1 which is held thereagainst by means of aspring) 71,said bell crank lever being connected y a. link 7-12 .to the rear edge of the' up er gripping'plate under lconsideratifonz s the gripping plate revolves, the roller 'pas'ses over the enlarged portion of clim 70 to the fiat face thereof whereupon the s`pring'71n forces the u per "gripping piantato. rock upon its-axis. uring this pe- 5riod`the-upper gripping plate assumes a parallel position 'wlth respect to its conrgpanion,see Fig. 21. fg-fI-lie lower gripping plate. is .slbstantiall the samel character'of mea-ns illustrated 1n-Figs..4,' Gand 14, in which a' "machine. This cam 72 is provided'fwithI an 'enlarged portion for co rating 'with th rocked by 72`fi's mounted on a fixed sleeve extendinwardly from the side frame of the 73, the otherl member of which bell crank lever is connected by a link 74 to the lower edge of the gripping plate 68.

With respect to the manner in which the blank is started after it leaves the gumming rolls, the advancing edge of the lower plate (i8 picks up the envelop in its revolution and straightens it. When the advancing edge of the plate 69 grips the blank, the travel of these forming plate,s, heilig slightly greater than the peripheral speed of the gumming rolls, will cause the blank to be held taut. The cams which operate the gripping plates are so sha )ed that they will not clamp the blank tightly until the blank so is ready to be released by the gumming rolls, at which time it will be held between the gripping plates.4 All danger of tearing the envelop is avoided by the immediate release i thereof by the gumming rolls.

Before the centers of the 'gripping plates' reach a vertical line drawn through the centers of the shafts 13"'and 14, said plates are forced by their cams and connections to aS- sume arallelism and to tightly grip the blank tween them.

75 indicates the creasing frame, which, when the parts are in position shown in Fig. 21, is moved upwardly above the lower edge of the upper gripping plate, as shown in the upper portion of Fig. 22. This frame is a rectangular frame' extending around the four sides of the lower gripping plate. (See Figs. 5 and 13). The means for" operating this frame is-shown in Figs.l 4, 6 and' 15, and consists of a cam 76 which cooperates with thero'ller on one member` of` the bell crank lever 77, whose other member coperates with a link 78 connected to a bar 79. 'This bar is connected tobell cranklevers80, which bell crank levers are connected by links 81 to the corners of the frame 7'5. In referring to the.bell crank level` 77, it must be' understood that the pivoted' rodof said leverextends across the frame 66 in which it is |'mounted and carries two u l wardly extending members (as rock armsg, the parts 78 to 81 inclusive being duplicated at each' end 'ofthe frame. -Thus the creasing frame 75 isI supported by links 81 at its four corners, By referring to Fig. -1.5 it".l

lwill be seen that as the roller rides up the enlarged'portion of cam'76, the creasing frame will be elevated and-remain'elevnted at' least .during one quarter revolution of the forming' mechanism, during which time the upper gripping plate will bewithdrawn from the blank. This wthdrawal,however, does not affect the creased blankl with its four. outstanding flaps, as the blank is well seated u on-the lower grippi plate and. within tllie creasing frame. Anger the end plates fold in the end flaps, ythe"crezarsingv frame is retracted.

Y 'Means 'for operating am endfolaing ne plates is illustrated in Figs. 4, 5, 6, 13,16 and 17. 82V are end-olding frames to which are secured triangular plates 82* designed to coperate with the end flaps of the envelops. These plates 82' are removably secured to the frames 82 so that different thicknesses of plates can be employed, depending upon the amount of ypressure it is desired to be exerted upon the end fiaps. The. thickness of' plates 82 would also be controlled b the thickness of paper in the envelop bank. The ends of framev82 are formed with perforated ears through which pass pivot screws into the creasing frame,` and to the outermost ears are secured pinions 83. With one of these piuions, cooperates an Vidle pinion 83' for the purpose of reversing motion. The `single 'p1nion 83 and the reversing inion 83 .coperate with rack teeth on aer 84 mounted by a. slot-and-pin connec- 4tion upon the creasing frame. A link 85 connects this rack bar with a rock arm 80 a fixed cam4 96 arranged lli fippsyfas shown at the 'cleasin mounted on Aa rock shaft 87 journaled in the 4post 68,depending from the lower gripping plate. -To the opposite end of this rock Shaft 87 (see Fig. 17) is secured a rock arln a link 89 to a block 90 slidlngly mounte on a. post 08 dependin from the lower gripping plate 68. A lin i 91 connects block 90 with a rock arm 92 on ii shaft-93, said shaft having a rock arm 91 otitis end carrying a roller cm'perating with alongside of the com 76. A sprin 93EL connected lto a'pin on the shaft (see ig. 4) holds the roller against the cam. When theroller rides upon the'enlarged portion of the cam, the end lates 82* are folded inwardly upon the blau as shown at the left in Fig. 22, and 4in dotted lines in Fig. 5; As shown in Fig. 4,'the roller is just starting up the enlarged portion o'f the cam, and the end plates, consequently, are just commencing their upward and inward movement.

A fter the-end plates have foldedthe end left in Fig. 22,' the -frarhe' -is partially retracted after the rol er asses the heel of the cam, see Fig. 15, and) rides down the enlarged eccentric'portion thereof, which extends approxi- 88 connected b3' f lmttel'fI `o e" qua.rt'er of a circle, and the seal-l ing p te, or plate which )resses the bottom ila'pjupon the folded end aps, is operated.

he means forl operating this sealing plate, as 'it might be termed, is best illus tratedtin Figs. 4, 5,-6, 13 and 19. 97 is a frame plvotally mounted `upon a rod 9S journaled in suitablebear'ings in the frame pinion by means of -a 6 6, said rod having a pinion 99 fixed thereon, which pinion coperates with a rack .100,

`said rack being held in osition against the ail or stirrup 101 swinging from the rod 98.

Rack 100 is mounted in the end of a rock 5 rln '102 carried by a shaft 103,11pon which shaft 107, having a gear 108 Vtion through an idle pinion shaft is arranged a rock arm 104 whose roller cooperates with a fixed cam 105 nrranged alongside of the cam 72. A spring 102 holds the roller against the cam. When the rollery is riding upon the reduced diameter of the cam, frame 97 (which is provided with a removable plate 97 for reasons described with reference to plate 87) 1s 1n an inoperative position. When, however, the roller rides u i the enlarged diameter of said cam, the rameil? is operated so as to cause the plate 97 to engage the bottom Hap and press the same with its gummed edges against the end Haps. The sealing plate 97 can fold the bottom flap inwardly while the end-folding plates 82 are in position.

The operative, position of the sealing plate is shown at the bottom of Fig. 22, and when the ,forming mechanism has reached this point in the revolution of its carrier, theA roller on the end of arm 104 is in readiness to drop down the abrupt shoulder on the cam on to the reduced portion, whereby the envelop is released from the forming mechanism. Prior to this time, however, the creasing frame has been fully retracted, such full retraction occurring when the roller reaches the end of the. enlarged eccelltric portion of cam 70, which. extends one quarter of a circle. from the heel of the cam and rides upon the concentric portion of the cam,A which constitutes the major portion thereof, extendingover half of the circle.

Means are provided for further creasing the top Hap of the envelop, which means consistiofi-evolving arms 100 (seel*`igs. 2 and 22), which arms are mounted upon receiving uio- 109 meshing with thegear 13. (See'Fig. 1.) Arms 100 are provided with a spring-held bur 110 which is so timed \\"itl\ relation to the form` ing mechanism that it will coiiperatc.\\itl1 the topiiap of the envelop at Vthe edge of the lower gripping plate,lto further crease said top flap before the sealing plate releases the envelop, as shown in Fig. 22. The envelop, when released b v the sealing plate (see Fig. 2) will be received in a guiding chute 11i and deposited upon the beit 3 to be carried away from theiuachine.

The upper gripping -plate heretofore refel-red to, in addition to being rocked on its axis, is also drawn iinvardlvor upwardly when in coperation with its com )anion lower gripping date. torom|wnsate or the differences in tiie path of 'circumferential travel between the edges and the center'of said plate. This will be seen by reference to Figs. 20 and 2l. In Fig. it :will be seen that the gripping plates are parallel to each other before the centers' thereof reach the lowergrippingplate causing the two, plates .period of cooperating to be thrust outward a horizontal position at this time by ronsonI of the rocking mechanism heretofore r'eferred to, and in order to compensate for the arcuated movement vand to insure the plates traveling a horizontal line, means are provided or causing the upper gripping plate to recede ,slightly durin this of the plates an' then y to its normalpath of movement. This movement is bestshownin F igs..2 and 4, wherein it will be seen that a cam 112 is fixed to the side framing o'f the machine. The fluctuation of this cam consists ina depression near lthe'bottom of the circular track.' .113 indicates a bell crank lever, one 'end =of which is provided with a roll to coperate with cam 112. The other member of'this bell crank lever is connected by a link 114'to a bar-115, which bar is connected to toggle levers -116 at each end. The

,innen pair` 'of toggle levers is connected to the frame`67, whilethe outer pair of toggle leversisconnected tothe head` piece 67 whrei'n't'he curved pieces of the upper gripping plate are mounted. Whenever thetog' gle vis-broken, as when tlie bellicrank lever ,113 '-dropsinto the recess of calin 112,'the

.upperl ripping plate is'dr'awn inwardly or.`

upwar 137,1)y ."virte,of suchvmovemnt be.-

-ing imparte 'to the head piece 67 which carries the gripping plate and which head .piec'ejis connected to ,the outer '(or lower) toggle '..levers 116, -the springs under the to h ug each other and `hold the envelop blank firmly, between them.` It 'will be Vobserved that the. toggle 'levers 4which. move the head piece 67Iand its carried grippinglaten wardl -or p 4X, ha

ve their .upper 'mem '113. The shaft and -its bell-crank lever'are jeo surrounded by a 4torsional spring (see dotted lines, Fig.4)` which. exercises al pressure' to force the rolle'r'into the-recess, of ca m1112 plate vivardly. It is during is perlo of, cooperationfbetweenfthe plates and while they are travelingin substantially avstraighthorzontal line that ltheol-easing frame is operated, 4Asjthe toggle levers are ,'straightened, thenl liinit of thisl horizontal movefment -is reached, and when therolle'r on the bell erankvi'lever again reaches its normal" path of fmovemenli on the cam, the yplates are ready.V to separate. lThe purpose inhav'- ingtheplates. ,coperate with elach. other for thisextended periody of time, is to enable thej-creasing.f rame-to o errate yslowly and with an easy. action.4 plaies ma .et the of their arcs of lxmgyement'Tand the creasing frame was compelled to do Work. at-the instant l p ers .v 116 conneetedto the4 frame 67', said toggle .'levers4 being controlled .by the bar. 115 connected by the link ,1.14 to the bell-crank levertherwis'e, if the ofsuch meeting, the machine could uol be operated to ,advantage at any great speed.

To prevent the innermost edge of the npper gripping plate from removing the gam from the bottom or sealin flap when said upper gripping plate is wit idrawn, I prc'lerably arrange-'oneor more pins 69 at about the center' of beveled rear edge of said upper grippin plate, which pins contact with thebottom a a and prevent saine from rubbing against tlhe upper gripping plate. By locatin the pins in the center of the gripping p ate, said pins travel in a path not occupied by '-tlie gum, and consequently do not remove any of the gum or become sticky so as to interfere with the proper operation of the machine.

So far as I am aware, I believe I am the first, in the art .'of 4envelop making, to cui `plo complementary parts, revolving about di' erent axes and cooperating with each other in the formation of envelops.

I am aware -that minor changes in the construction, arrangement and combination of the severalparts of my desvice'can be made andl substituted forlthovse herein shown and described, without' in the' least departing from the' nature and principleof my invention.

What-I laimis: Y 1.4 In afmachine for making envelops, complementary. mechanisms revolvin about different axesand coperating. wit each other-for the formation of envelops, one o f -sjaid complementary mechanisms having a creasing vframe 'which simultaneously acts upon the four sides of the envelop, and' means-4 for -rocking said complementary mechanisms to compensate for varying arcs' of travel.

l 2. In'fa machinifor making envelops the combination of com )lementary mechanisms operatng about di erent axes and cop-- eratin With cach other in the formation ofA envelops' from blanks, fixed ca'ms for operating the several parts of*v theA forming mechanism, one of which parts is a gcreas lngfframe which simultaneously operates upon all four sides of an envelop, and means for rocking said creasing frame and its complementary part to compensate for the vary! ing ares4 of movel ent of said parts ,BIna machi e vforfmaki'ng envelope.

the combination of grippin plates revolving aboutdifierent centers, orming mechanis'mcoperating therewith, lsaid formin mechanism including a creasing-frame whic i is moved tbsimultaneously crease thefour Y sides of the.\ velop, ,and means for rockingV said grippir'ig` plates 'to hold them in paraxe alllism while movingV about theiry respective 4.

fn a machine for making envelope the coirbination of gripping 'platesrevolving` about diiferent centers, mechanism copl5. grippingplates to bring into pireratin" therewith to rock said plates and hold them close in paallelism, means for retracting one of said plates, and a creasing frame which eoperates with said gripping plates while they are closed to simu taneously ciease the four sides of the envelop.

In a machine for makinV envelops', the combination with gripping p ates revolving aboutdiii'erent centers and adapted to close upon each other, and means for rocking said gripping plates in their respective mounts, and a creasing frame which coperates with said gripping plates while they are closed to simultaneously crease the four sides of the envelop.

-6. In a machine for making envelops, the combination of gripping plates revolving aboilt diiiei'cht centers and adapted to close upon each other, one of which gripping plates is yieldingly mounted, and means for rocking said gripping plates in their respec# tive mounts.

''. In a machine for making envelops, the

lcombination with upper and lower revoluble gripping plates adapted to close upon each other, means for rocking said gripping plates, in'eans for moving one of said gripping plates inwardly with respect toits axis of rotation, and a creasing frame which cooperates with sai'd gripping plates while they are closed to simultaneously crease the four sides of the envelop.

8. In .i machine forfinaking envelops, the on'ibination with uppei" and lower gripping plates wliichievolve about separate axes, said Iplates gripping an envelop blank to be folded in their revolution, means for rocking said-plates to parallelisi'n after the blank has been gripped between the plates,- and means for imparting inward movement to .one of said plates while the blank is held hy said plate.

9. [n a machine for making envelops the combination of gripping plates revolving about diti'ereiit centers, one of which grippin plates is yieldiligly mounted, means for roc 'ing said grippin plates in their respec tive centers so as to )ring them iiito.-|iaral lelisiii, and means for imparting movement to said i gripping plates whereby they are caused to approaci and recede Vfrom each other independently of their revoluble tra vel 10'. 'In a machine for making evelops, the combination with revoluble upper and lower gripping plates, a creasing frame lwhich is operatedto initially crease .the

flaps of thc envelop blank on all foiir sides while the same is held between said gripping plates,l anda fixed cam for operating said creasing fram'e.

11. In a machine for making envelops, the combination with revoluble upper iind lower gripping plates, ineai'isfor rocking for operating said sealing allelism, a creasing frame foi' simultaneoiisly creasing the foar sides of the envelop,

and end wing plates said creasing frame.

12. In a machine for making envelops, the combination with revoluble upper and lower gripping plates, means for rocking said gripping plates to bring them into parallelism, a creasimIr frame for simultanepivotally mounted on l ously creasing the our sides of the envelop,

end wing plates pivotally mounted on said cieasing trame, and a fixed cam for operating said end wing plates.

]3. In a inachine for makingl envelops,

' allelism. pivotally mounted' frames coperating with one of said gripping plates, and folding wing plates removably mounted on said frames whereby` plates' of different thicknesses may be mounted on the frames. 15. In a machine for making envelops the .combination with a revoluble gripping plate of a revoluble creasing frame coperating therewith, end folding )lates pivotallv mounted on said creasing rame, gear teeti carried bysaid frame, a rack bar meshing with said teeth, means for moving said rack b: 'as the frame revolves, and means for rocking said fraaie in its revolution.

16. In a machine for making envelops, the combination with upper and lower gripping plates, a creasing frame for simultaneously Vcreasing the fou'rsides of the en-I velop, cnd-folding plates. and a 4sealing plate, each revolving-and operating successively upon the -blank and means forfrocking all of said parts in their revolutionl.

17. In a machine for making enveilops, the combination with revoluble upper and'lower gripping plates, a .creasing frame. end-fold ing plates, a sealing plate, and fixed cams for operating said creasing frame, end-foldf` ing plates and sealing plate.

18. In a machine 4t'or making envelops the combination of revolving upper lmd lower' gripping plates, means for ro'tiking said plates and closing them in parallelism in their revolutioii,"a sealing plate movable with one of said4 gripping plates, and means plate,-V .f 19; In a machine for mnking-envelops the combination of revolving iippeiwand lower gripping plates,` means `for ro'king said gripping` plates in their revolution so esto izfs .1.. 'wll'ielit ecompleted-envelop'is receiyed.

bringing) iufa ps3 1e1im;zmeans for folaingftheinda @betteln flap ofthe laf 'd means'foijfntllyt-flding the top p .'e plateafter the p'png plate as beenfw'ithdrawn.

ti'onof tei cllrevolutiqn. so as to bring 'allel'ism,` lrevlvin forming @painting with Sai gripping c ludiig a sealing plate', a -.giuide 1 "'ngjtljfff' rmed envelop when re- 'g v13late,'ar i d.a belt upon 21; Infa machine' for making'envelops, the bombinatiojivi th a'gripping 1at e, of a prof ectionL antan/ged 'near l the e p'a'ce th'ef'giin'nned flap of the -blankthere.

rom.

combination .with vupper and lower revoluble gripping plates; one of which is--providedwith a prej'eetioa-t its edge for preventing surface of 'the' blank.

said grippiiigglate from ..w ping the' gummed 2.3. In amalijiieffor making enfvelo 's,the

combination ivitlrot'aryfcarriers, of rames removably mounted thereonj-and gripping plates arrangednponand moyable witnres pe'ct to sai -fijames and acreasmgirame coperating'with sai grippingplates for si;l

mnltaneously creasing the four Sides." (1f-tbe envelop.

24. In a' machine for melting envelope, the combination with '.paallel' 4shafts carryiremvableframes gripping plates moan Onffaid fra "',1 arming-mechanism copera'ting witli- 'said' gripping plates', -sfa'ld forming' f nfieclian1s m inclndin to simnltane'ousl. .ici-"ease the four si' les* of 'thefenif'elog an ied cams. for..,actuatingsaid forming mechanism.

25. In a macli'ne for .making envelop's the' combination '.of tWo' revolnble ing plates, means for closing ,sa-id gripping' p ates and bringing them into paral el1s'm,a 'creasing -'frame "embracing one, of said gripping'- plates',an`clV means' forjrno'ving 'said creasing Atraine beyondthe edge 'of the opposite grip.-

2.6. T Inainacliihe'for making envelope the' combinacion. lofi-sirname gnppinf plates, means for closing in parel elism, 'a

creasing Eraine'einbracing lone 'of' said fgrip` pl'ngfplales' 'and movable 'beyond the edge of the companionpla'teto crease theljlank, 'and coperating with saidA folding mechanism1'v creasing. frame 27.. Ina .machine 4for"imiking 'envelope the means for closing them" and maintaining parallelism therebetween, a creasil'lg-trz'xm'e carried by one of said gripping plates and anism 'afte "finachine'for'inaking engel?) s the 'f-re'volvingup 'r adfgovger' ilneanal for roc "ng aaidgnpge thereof to 22. I-n amachin'e'for making envelops, the

a. creasing frame`- which wperjatcspwith t eA gripping lates ping p'jlate is withdrawn.

the' combination 'of which' travels in an en said-plaveswhen close foidin mechanism; and means for operatingsad. oldng .the blank.

2'28.' .In a machine for making envelope the combination lof a series of revoluble grip'- vpulg plates,"means for rocking said plates to.

maintain parallelism and bring them to a "closed position n.pon the blank', a rectangu- .`;lai creasing frame telescopically mounted -withl respect to o ne of said plates',` means for movingvsaid .frame beyond the'edge of the movable beyod the edge of the other one'ofV mecha r thegripping plates nave released companion plate'wllen' said-plates are closed,

and folding mechanism conerati'ng with each creasin frametofol'd t e flaps on the creased blan 29. In a 'machine 'for' makingenvelops the combination, of revolving gripping plates',

means'formaintaining said gripping plates -parallel and in a closed osition, lframe cooperating with e blank when said plates -are closed, and end folding wings' movablewith one of said gripping plates tov fold-the end flapswyhen-.thebl'ank 1s released bythe grippin plates;

'n amac ine for making enve1op's,the combination o f two gripping platesfmovable in diilelgent pat si' a creasing frame movable .with one of sald plates-or'simuL' taneously creasin all sides ofthe-blank and end and side fo ding' wings 'movable with.

one of said gripping plates to-'fold the flaps `after the gripping plates have ceased to coess path.; .a creasing 32: In a machine for making enrelopsithe. i

combinationfottwo gripping plates, one lof combination of two'gripping plates,on.e tf

which travels-in an endlesspath, a creasing frame 'for simiiltaneouslyoreasingallfsides of the b1ank,` afnd. a side folding-"wing movable withone of said gripping plates for' foldii g5 the end and side flaps after the other gripping plate is' wthdra-wng 33. In aV machine E-for Vmaking envelopsi' ess path, said plates coperating tov ip the blank -on all of twojgriping plates, one f -i'ze the mar' inal ed es of tl e e'nvelo acreasing.

frame or s'imu taneol-islyj creaslng all;..s i'deS-' ofrthe b1ank,'and aside 4foldingAvingifmovplates for cot the'combnation of two grip 

